a-a a-c a-t aaa aac aad aao aap aar aat ac- aca acc acd aco acp acr act ad- ada adc add ado adp adr adt aoa aoc aod aoo aop aor aot ap- apa apc apd apo app apr apt ar- ara arc ard aro arp arr art at- ata atc atd ato atp atr att c-- caa cac cad cao cap car cat cca ccc ccd cco ccp ccr cct cda cdc cdd cdo cdp cdr cdt co- coa coc cod coo cop cor cot cpa cpc cpd cpo cpp cpr cpt cra crc crd cro crp crr crt cta ctc ctd cto ctp ctr ctt daa dac dad dao dap dar dat dca dcc dcd dco dcp dcr dct dda ddc ddd ddo ddp ddr ddt doa doc dod doo dop dor dot dpa dpc dpd dpo dpp dpr dpt dra drc drd dro drp drr drt dta dtc dtd dto dtp dtr dtt oaa oac oad oao oap oar oat oc- oca occ ocd oco ocp ocr oct oda odc odd odo odp odr odt oo- ooa ooc ood ooo oop oor oot op- opa opc opd opo opp opr opt or- ora orc ord oro orp orr ort ot- ota otc otd oto otp otr ott p-p paa pac pad pao pap par pat pca pcc pcd pco pcp pcr pct pda pdc pdd pdo pdp pdr pdt poa poc pod poo pop por pot ppa ppc ppd ppo ppp ppr ppt pra prc prd pro prp prr prt pt- pta ptc ptd pto ptp ptr ptt ra- raa rac rad rao rap rar rat rca rcc rcd rco rcp rcr rct rda rdc rdd rdo rdp rdr rdt roa roc rod roo rop ror rot rpa rpc rpd rpo rpp rpr rpt rra rrc rrd rrp rrr rrt rta rtc rtd rto rtp rtr rtt taa tac tad tao tap tar tat tca tcc tcd tco tcp tcr tct tda tdc tdd tdo tdp tdr tdt to- toa toc tod too top tor tot tpa tpc tpd tpo tpp tpr tpt tra trc trd tro trp trr trt tta ttc ttd tto ttp ttr ttt